Spoke grinding and polishing machine



(No Mbdgl.)

C. D. CARROLL. SPOKE GRINDING AND POLISHING MACHINE.

No. 537,274. Patented Apr.

Z/MM abbot/W24 fUNITED STAT S I PATENT OFFICE,

OLAUD D. CARROLL, OF A-VOOA, NEW YORK.

SPOKE GRINDING AND PQLISHING MACHINE;

SPECIFICATION form-ing part of Letters Patent No. 537,274,dated April 9,1895.

' Application filed July 20,1894. Serial No. 518.104, on model.)

To all whom it may concern.-

Be it known that I, OLAUD D. CARROLL, a citizen of the United States,residing at Avoca, 1n the county of Steuben and State of New York, haveinvented certain new and useful Improvements in Spoke Grinding andPolish ing Machines; and I do declare the following in g and polishingspokes, and it has for its oh- 4 ject to provide a machine in which theoperation of grinding and polishing is expeditiously and efficientlyperformed, and the operation of which is completely within the will orunder the control of the operator.

It has further for its object to providea machine in which is containedthe. smallest number of parts consistent with efficiency, and also toprovide for the adjustment of the parts to accommodate them to thecondition of the particular work to be performed.

To the accomplishment of the foregoing and such other objects as mayhereinafter appear, the invention consists in the construction,.and inthe combination of parts hereinafter particularly described and thensought to be specifically defined by the claims, reference being had tothe accompanying drawing forming a part hereof, and which represents inperspective the essential parts of a machine embodying the features ofmy invention. 7

In the drawing the numeral 1 designates a frame of any suitableconstruction supporting at opposite endsthereof the rolls 2 and 3 Whoseaxles or shafts are journaled in suitable boxes 4 secured to the frame,and to the extended shaft '5 of one of the rolls is secured the bandpulley 6 through which motion is transmitted to the rolls 2 and 3 and tothe endless belt or apron 7 which passes around said pulleys and whichis formed with an abrading surface of suitable material which will serveto impart the desired finish to the spoke to be acted on by it.

The numerals 8 designate suitable uprights another spoke in its place.

or standards which may be braced by rods 9 and 10, which standardssupport a horizontal shaft ll which is free to turn in its hearings insaid uprights and which may be held againstlongitudinal movement by thecollars 12, which also admit of longitudinal adj ust- 'ment of the shaft11. The shaft 11 has mounted upon it so as to turn freely thereon adouble flange pulley 13, 14 which may be held against longitudinalmovement in one direction by a set collar 15 and in the other directionby a set collar 16 which may consti tute the hub of an arm 17 to be morefully described hereinafter. The portion 13 of the double pulley isdesigned to receive the driving belt 18, and the portion 14 of saidpulley is designed to receive the transmitting power belt 19 which alsopasses around a pulley 20 mounted upon the shaft 21 which carries at itsother end a chuck 22, said shaft 21 being jour' naled in the free end ofthe arm 17, the other end of said arm being secured to the shaft 11 soas to be moved therewith by means of a set depressed proportionately tothe throw or adjusted position of the arm 17 which carries the spokechuck 22, so as to maintain such relation between the spoke chuck andthe stop-arm 24 that when the spoke chuck is thrown upward into itsnon-operative position, a catch 31 attached to the chuck will come incontact with the end of the stop-arm and have its rotation stopped so asto permit the removal of the spoke and the insertion of This alsoinsures the stopping of the chuck'in the same posi tion every time thatits catch comes in contact with the stop-arm. It is preferred to havethe end of the stop-arm next to the chuck curve or arched as shown. Thearm 29-also sustains a rod 32 which carries at its upper end a flangedpulley or sheave 33 which bears against the under side of the powertransmitting belt 19 and serves as a belt tightener so that when the arm17 carrying the chuck 22 and pulley is lowered, the belt 19 is drawnagainst the tightening pulley 33 thereby causing the latter to take upthe slack in the belt thus causing the belt to turn the pulley 20 andrevolve the chuck 22 and rotate the spoke against the abrasive belt orapron 7. When the arm 17 is elevated, the tension of the belt 19 on thepulley 33 is reduced and the belt caused to slacken to an extent that itwill fail to revolve the pulley 20.

The rod 32 which carries the belt tightening pulley 33 is verticallyadjustable in the arm 2.) by means of a set screw 34: so that thepressure of the roller against the power transmitting belt may bevaried. The arm 29 is supported from one of the standards 8 and issecured to that standard by a bolt 35 passing through a slot 36 in thearm so as to permit the arm to be adjusted laterally thus bringing therods 27 and 32 into proper relation with the belt 19 and stop-arm 2 1.The arm 29 is braced by a diagonally extending arm 37 which is attachedat one end to the arm 29 and is connected to the upright 8 by a bolt 38passing through a slot 39 in the arm 37 which allows the latter to beadjusted correspondingly to the arm 2.).

The shaft 11 carries an arm which serves to hold the outer end of thespoke against the abrasive belt or apron 7. This arm is designated bythe numeral 40, and is preferably formed in two parts, one part having ahub 41 through which the shaft 11 passes and provided with a set screw42 for the purpose of securing the arm to the shaft. The other part ormemberof the arm is formed with slot 43 through which a bolt 44. passesand secures it to the other part or member of the arm. By forming onepart with the slot 43, the arm can be lengthened and shortened so as toaccommodate it to the position of the spoke upon the abrasive apron orbelt. The outer end of this arm is formed with a notch 45 in which theouter portion of the spoke will lie and which enables the arm to holdthe spoke to the apron or belt. The arm is provided with a bracket 46which supports a guard 47 formed substantially as shown and lyingoutside of the belt 7 and extending below the end of arm 40 and adaptedto bear against the inner side of the spoke 48 so as to prevent thespoke from passing inward from beneath the outer end of the arm. Thisguard will also serve to guide the outer end of the spoke into positionagainst the notched end of the arm 40. It is preferred to form the shankportion of this guide with threads so as to screw into the bracket 46 asillustrated, and to provide nuts 49 to the threaded portion of the shankand against opposite sides of the bracket- 46 so as to hold the guide inthe position to which it may be adjusted.

A lever 50 is secured to the shaft 11 and projects to the rear thereofand is designed to receive a counter balancing weight 51, or itsequivalent, so that when the downward pressure on the chuck arm 17 whichholds the spoke against the abrasive apron is released, the counterbalancing weight will turn the shaft 11 so as to elevate the chuck arm17, transmitting power belt 19, and the spoke holding arm 40,thuscarrying the spoke from contact with the abrasive apron or belt '7.

Suitable means is provided for lowering the chuck arm 17, the powertransmitting belt 19, and the spoke holding arm 45 so as to bring thespoke into contact with the abrasive apron or belt 7. Suitable means forthis purpose may consist of a rod 52 connected at one end to the chuckarm 17 and at the otherend to an operating lever, for instance to a footor pedal lever 53 fulerumed at 54; and having a bracket or arm 55through which thelower end of the rod 52 may pass and have ascrew nut 56applied to its threaded portion beneath the bracket or arm 55 so that byadjusting that nut the point of connection may be adjusted and the throwof the rod 52 thus regulated.

In operation, one end of the spoke is placed between the jaws of thechuck and the other end against the notched end of the spoke holding arm40. The foot treadle 53 is then depressed which lowers the chuck arm 17and at the same time carries down the spoke holding arm 40 so as tobring the spoke against the surface of the abrasive belt or apron 7, thepower transmitting belt 19 being at the same time pressed against thetightener pulley 33 so as to make the power transmitting belt taut,whereupon the shaft which carries the chuck is rotated thus causing thespoke to be revolved in contact with the surface of the abrasive beltwhich is at the same time in motion, which rotation of the spokecontinues until the same has received the desired finish. The pressureon the foot pedal or lever 53 is then released whereupon the counterbalancing weight 51 turns the shaft 11 so as to elevate the spokeholding arm 40- and the chuck arm 17, at the same time slackening thepower transmitting belt so that the power is cut off from the chuck. Asthe chuck arm and other parts mentioned are elevated, the catch 31 onthe chuck is brought into contact with the end of the stop-arm 2% whichchecks or stops the vibration of the chuck and enables the spoke to beremoved and another inserted in its place, and the operation describedis then repeated so long as the machine is in operation.

I have described with particularity what I consider to be the preferredconstruction and arrangement of the several parts butit is obvious thatalterations may be made in such details without departing from theessential features of the machine.

Having described my invention and set forth its merits, what I claimis- 1. In a spoke grinding and polishing machine, the combination of themain rotatable shaft, the chuck arm secured to said shaft to theopposite end of the chuck arm, the belt tightener pulley supportedbeneath the belt, the spoke holding arm connected at one end to the mainrotatable shaft, means for depressing the spoke holding arm and thechuck arm to hold the spoke against the abrasive belt and to press thepower transmitting belt against the pulley to take up slack in the beltand cause it to transmit power to the spoke chuck, and means forelevating the spoke holding arm and the chuck arm to move the spoke fromthe abrasive belt and for lifting the power transmitting belt to createslack therein, substantially as and for the purposes described.

2. In a spoke grinding and polishing machine, the combination of themain rotatable shaft, the spoke holding arm and the chuck arm secured tosaid shaft to move therewith, the chuck supported at the free end of thechuck arm and provided with a catch, and the stop-arm having one endconnected freely with the main rotatable shaft and the other end inposition to be engaged by the catch of the chuck when the chuck iselevated, substantially as and for the purposes described.

3. In a spoke grinding and polishing machine, the combination with theadjustable spoke holding arm, of the guard 47 adjustable with said armattached thereto to one side of the abrading belt and extending belowsaid arm and arranged to engage the spoke and prevent it from passingfrom the end of the spoke holding arm, substantially as and for thepurposes described.

4:. In a spoke grinding and polishing machine, the combination with thespoke holding arm, of the guard 47 adjustable lengthwise of the arm andsecured at one side of the arm and arranged to engage the spoke andprevent it passing from the end of said arm, substantially as and forthe purposes described.

5. In a spoke grinding and polishing machine, the combination of thechuck arm supporting at one end the spoke chuck and the pulley connectedwith the chuck, theloose pulley, the power transmitting belt connectingsaid loose pulley and the pulley supported at the free end of the chuckarm, a belt tightener pulley arranged to engage with the powertransmitting belt, and means for depressing the free end of the chuckarm to lower the spoke chuck and to press the power transmitting beltagainst the-belt tightener pulley to tighten the belt, substantially asand for the purposes described.

6. In a spoke grinding and polishing machine, the combination of thechuck arm carrying at the free end the spoke chuck and the pulleyconnected therewith, the loose pulley, the power transmitting beltconnecting said loose pulley and the pulley at the free end of the chuckarm, the stop-arm having one end arranged to be engaged by a portion ofthe chuck pulley when the latter is raised, and the arm carrying a rodto support the stoparm and a rod provided with a belt tightener pulleyto render the power transmitting belt operative when the spoke, chuck islowered and non operative when said chuck is elevated, substantially asand for the'purposes described.

7. In a spoke grinding and polishing machine, the combination of themain rotatable shaft, the chuck arm connected atone end thereto andcarrying at its opposite end a spoke chuck and the pulley connectedtherewith, the driving and loose pulley mounted on the main rotatableshaft, the power transmitting belt connecting the loose pulley and thepulley carried at the free end of the chuck arm, the spoke holdingarmconnected to the stop-arm having a free connection with the mainrotating shaft and its opposite end in position to have a portion of thespoke chuck engage therewith when elevated, the arm carrying a rod tosupport the stop arm and a rod .main rotating shaft to move therewith,the i supporting a belt ,tightener pulley, means for' depressing thefree ends of the spoke holding arm, chuck arm and power transmittingbelt, and means for elevating said parts when the machine is to bethrownout of operation, substantially as and for the purposes described. Intestimony whereof I affix my signature in presence of two witnesses.

CLAUD D..CARROLL. Witnesses:

E. G. ARMSTRONG, H. R. STEVER;

